Triarylamminium Radical Cation Facilitates the Deprotection of<i>tert</i>-Butyl Groups in Esters, Ethers, Carbonates, and Carbamates
作者:Denisa Hidasová、Tomáš Slanina
DOI:10.1021/acs.joc.3c00238
日期:2023.6.2
tris-4-bromophenylamminium radical cation, commonly known as magic blue (MB•+), and triethylsilane. Magic blue catalytically facilitates the cleavage of the C–O bond in tert-butyl carbamates, carbonates, esters, and ethers in a high isolated yield of up to 95%, and sacrificial triethylsilane accelerates the reaction. Without requiring high temperatures, transition metals, or strong acidic or basic catalysts
我们报告了使用两种商业试剂进行温和Ot Bu脱保护的催化方案:三-4-溴苯铵自由基阳离子,通常称为魔幻蓝 (MB •+ ) 和三乙基硅烷。魔幻蓝催化促进氨基甲酸叔丁酯、碳酸酯、酯和醚中 C-O 键的裂解,分离产率高达 95%,牺牲三乙基硅烷加速反应。无需高温、过渡金属或强酸或强碱催化剂,该方法适用于结构多样的化合物,包括脂肪族、芳香族和杂环底物。